On the emerging global relevance of atmospheric rivers and impacts on landscapes and water resources

This progress report discusses the lineage of atmospheric rivers (ARs) research, focusing on the transformation of the topic from an important regional atmospheric feature along the U.S. West Coast to a globally relevant driver of extreme hydrometeorological events. As the AR literature has advanced, so has the regional expanse covered, initially expanding into the Central U.S. and Europe. Recently, new, emerging regions are being explored in the AR literature such as the high latitudes, New Zealand, China, North Africa, and the Middle East. The literature on the impact of AR-driven hydrometeorological events on land surface processes (e.g., landslides and avalanches) and water resources is also rapidly developing. This progress report seeks to expose the broader physical geography discipline to the global relevance of ARs and promote new applied research frontiers at the intersection of ARs and those processes studied by physical geographers.